eortiz said:
Yes, Closesupport, please say it in plain english. I'm interested since I've seen some reading materials that fast pace=burns glycogen while slow pace=burns fat. Then again some says fast pace=burns glycogen then fat when you run out of glycogen. In fact, I remember in a Bicycling magazine article that Andy Hampsten rode slow pace (not sure what % HR) in the morning with out breakfast and just coffee. This trains his body to burn fat since there is not much glycogen to burn since he did not eat breakfast. I used to do that but I just feel I can go harder and feel stronger when I have some fuel in me before I ride. Just my opinion.
makes sense dont you think, he's training but i bet a pound to a penny he consumes a large carb meal for breakfast on a race day or loading up to competition. thats like saying that an athlete wuldn't train at altitude because of the lack of air and it would inhibit is training performance. however its a training thing working at altitude makes the body work efficiently compensating the lower levels of oxygen with the introduction of large amounts of
erythropoietin naturally so when returning to sea level the athlete is able to provide is muscles with more oxygen. due to the amount of ......
likewise in training i guess the body is trainied to work effectively on what stores it has and since liver fats and glycogen are not availale the body depends on what stores it has available, but when liver fats and other supplies.
Quote:
Author: steve wooton
title:
nutrition for sport
if an activity is performed intermittently much lower levels of glycogen utilization will be observed than if the same amount of exercise is performed continuously without any recovery periods. brief higher intensity periods of exercise the lower the rate that glycogen depletion. this may be due to a greater oxidative utilization of glycogen (less lactate formation) or a greater CP utilization in each bout, which would allow the oxygen supplies within the muscle to be recharged and CP to be resynthesised, at lower intensities performed over prolonged periods, the glycogen sparing effect may be a result of a greater fat utilization, lactate clearance or glycogen repletion during recovery.
one feature of intermittent exercise is that recovery periods between bouts enale more work to be performed as the consequences of fatigue are then less noteable. the concentration of lactate in the lood is much lower when work is performed intermittently so, while there is a tendency to spare glycogen during a intermittent exercise, more glycogen may be utilized in total as more work is performed.
endurance training also results in lower rates of glycogen utilization for the same work, acheived through a greater oxidative utilization of glycogen (less glycogen accumulating as lactate) and a greater energy requirement being met by the oxidation of fats and other substrates, such as ketones and amino acids this situation is met by physialogical and metabolic changes which serve to increase the oxidative capacity of a working muscle
1) a greater density of the mitochondria within a cell, leading to an increase in oxidative enzymes
2) increased capilerization more capillaries provide more blood to each muscle cell
3) enhanced glycogenic capabilities of both the liver and the muscle
4) a greater proportion of cardiac output that can be distributed to the working muscle
so the point at which glycogen becomes limiting and contributes to the fatigue process is delayed.
gosh! pity you cant cut and paste from a book.....
noticably bringing about these changes makes the same task easier to perform, however in a competetive situation there is little or no desire to finish in a better conditionin the same time with the same degree of effort, more than likely it is more work will be desired , such that the rate of work is increased and performed to the point of fatigue and discomfort.
well there you go so what we basically saying is that interval training with recovery (not necessarily stopping but easing the pace to recover) it is possible to work at greater intensities and rates drawing the same degree of carb metabolism in conjunction with fat oxidation. in this way the same degree of glycogen depletion will be attained and the subjective impressions of fatigue will be the same , yet the performance will be remarkably enhanced
(quote) sprinting results in lower rates of glycogen for the same amount of work a swell as enhanced buffering capacity.
do i need to continue:............
And the point of this book is?
